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Exchange AS on Mobile stops working when running Ad-Hoc WiFi on Server

Exchange AS on Mobile stops working when running Ad-Hoc WiFi on Server

12th July 2010, 12:13

Hi all,

I find this a strange one. My Remote mail access is working absolutely fine via both RPC over HTTPS through Outlook and via Direct Push on my Windows Mobile phone.

However, I recently decided to try and resurrect my old Windows Mobile PDA (O2 XDA IIi, HTC Alpine, WinMo 2003SE) to use as an incoming IP Phone. The device unfortunately does not support WPA/WPA2 - even when using the Odyssey Access Client, so it must be a Driver-level issue.

So, with that in mind I dug out my old USB Wifi-b adapter and installed it on the Server. I setup an Ad-Hoc network secured with WEP (I know it's bad, but at the moment it is only for testing and is not running 24/7 - in fact has not been on since this problem occurred.) When the phone connected and I had tested it and was happy, I left as is for a few hours or so until I noticed my phone was no longer connected (via GPRS) to the Exchange Server and could not connect when I hit the Sync button.

I disabled the Ad-Hoc WLAN, disabled the Adapter and unplugged it - and bingo - the phone reconnected and some emails got pushed through. This made me wonder if Exchange is getting confused between the WLAN which is purely incoming for the IP-Phone and it's normal LAN connection? Or could it be any number of things?